Silver-containing precursor and product articles containing cellulosic polymers

An article comprising a substrate, and having disposed on a supporting surface thereof, a pattern of a dry silver nanoparticle-containing composition comprising:

• at least 20 weight % of one or more (a) polymers, based on the total weight of the pattern, which one or more (a) polymers are selected from one or more of cellulose acetate, cellulose acetate phthalate, cellulose acetate butyrate, cellulose acetate propionate, cellulose acetate trimellitate, hydroxypropylmethyl cellulose phthalate, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, hydroxypropylmethyl cellulose, and carboxymethyl cellulose;
• (d) silver nanoparticles having a mean particle size of at least 25 nm and up to and including 750 nm, that are present in the pattern in an amount of at least 0.1 weight % and up to and including 400 weight %, based on the total weight of the one or more (a) polymers;
• (e) carbon black in an amount of at least 5 weight % and up to and including 50 weight %, based on the total weight of the one or more (a) polymers;
• and
• less than 5 mol % of (b) reducible silver ions, based on the total molar amount of dry silver in the silver nanoparticle-containing composition.